Mohrigia cylindrata Xu & Huang, 2017

Xu, Jun, Shi, Kai, Huang, Junhao & Wu, Hong, 2017, Review of the genus Mohrigia Menzel (Diptera, Sciaridae) from China, Zootaxa 4300 (1), pp. 71-98 : 74-77

Mohrigia cylindrata Xu & Huang , sp. nov.

( Figs 2 , 14 A, 16)

Material examined. Holotype, male. China, Tibet . Motuo, Lage, 29°31'2"N, 94°52'52"E, 3193 m, 23-VII-2014, leg. Jun Xu [SM02406]. Paratypes: 1 male, the same data as holotype [SM02407] ; 1 male, Motuo, Zhamo road, K18, 29°44'19''N, 95°40'41''E, 3286 m, 21-VII-2014, leg. Jun Xu [SM02527]. Yunnan. 1 male, Baoshan, Nankang, Gaoligong Nature Reserve, 24°49.729'N, 98°46.074'E, 2181 m, 11-V-2009, leg. Su-jiong Zhang [SM00899].

Diagnosis. The species is characterized by its thick-ovate gonostylus with the dorsal mesial margin expanded, with an apical tooth arising from a subcylindrical dorsal lobe, two long flagellate setae on the inner side of the gonostylus; hypopygium with a small setose intercoxal lobe; tegmen slightly and smoothly curved, parameral apodeme continuously sclerotized forming a central strip on dorsal side.

Description (male). Color. Head and antennae dark brown; abdomen, hypopygium and thorax yellowishbrown; mesonotum brown; palps and legs pale brown; wings fumose.

Head ( Figs 2 C, D). Eye bridge with 2 rows of facets. Prefrons with 15 setae. Maxillary palps 3-segmented, basal segment with 2 setae; 2nd segment with 6–8 setae; 3rd segment with 5–8 setae. Length/width index of 4th flagellomere: 3.67–3.93.

Thorax. Anterior pronotum with 3–5 setae, episternum 1 with 5–7 setae. Wings ( Fig. 1 4 A). Wing length 2.24–2.64 mm, width/length: 0.35–0.37. c/w: 0.72–0.77. R1/R: 0.69–0.92. r-m, stM, M1 and M2 bare, CuA1 and CuA2 bare. Legs ( Fig. 2 E). Length of spur/width of foretibia 0.96–1.10. Length of femur/length of metatarsus: foreleg 1.42–1.63. Length of metatarsus/length of tibia: foreleg 0.55–0.58, hind leg 0.47–0.53. Length of hind tibia/ length of thorax 1.20–1.34. Claws toothed.

Hypopygium ( Figs 2 A, B). The gonocoxite as long as the gonostylus. The gonostylus thick-ovate, densely setose on the apicoventral part, dorsal mesial margin expanded, with an apical tooth arising from a subcylindrical dorsal lobe, two long flagellate setae on the inner side of the gonostylus. Hypopygium with a small setose intercoxal lobe. Tegmen slightly and smoothly curved, parameral apodeme continuously sclerotized forming a central strip on dorsal side. Aedeagus relatively short. Sternite 10 with 1 seta on each half.

Distribution. China (Yunnan, Tibet, Fig. 16 ).

Remarks. The species is close to M. composivera Rudzinski, 2006 as they share an oval gonostylus and a small setose intercoxal lobe. But the new species differs in having a subcylindrical dorsal lobe, whereas the dorsal lobe is indistinct in M. composivera . In addition, M. composivera has a finger-like process at the apex of the central strip, while the new species does not have this structure.

Etymology. This species is named after the subcylindrical dorsal lobe of the gonostylus, from the Latin adjective cylindratus, meaning cylindrical.

Figures

FIGURE 1. Mohrigia angusta sp. nov., male. holotype. A, right gonostylus, ventral view; B, right gonostylus, dorsal view; C, gonocoxite, ventral view; D, palps, lateral view; E, 4 th flagellomere, lateral view; F, apex of foretibia, posteroventral view. Scale bar = 0.10 mm.

FIGURE 2. Mohrigia cylindrata sp. nov., male, holotype. A, left gonostylus, ventral view; B, part of hypopygium, ventral view; C, palps, lateral view; D, 4 th flagellomere, lateral view; E, apex of foretibia, posteroventral view. Scale bar = 0.10 mm.

FIGURE 3. Mohrigia globulosa sp. nov., male, holotype. A, right gonostylus, ventral view; B, right gonostylus, dorsal view; C, gonocoxite, ventral view; D, palps, lateral view; E, 4 th flagellomere, lateral view; F, apex of foretibia, posteroventral view. Scale bar = 0.10 mm.

FIGURE 4. Mohrigia inflata sp. nov., male, holotype. A, part of hypopygium, ventral view; B, right gonostylus, ventral view; C, palps, lateral view; D, 4 th flagellomere, lateral view; E, apex of foretibia, posteroventral view. Scale bar = 0.10 mm.

FIGURE 14. Wings, dorsal view. A, Mohrigia cylindrata sp. nov. (holotype); B, Mohrigia globulosa sp. nov. (holotype); C, Mohrigia angusta sp. nov. (holotype); D, Mohrigia notolobos sp. nov. (holotype); E, Mohrigia scrobiculata sp. nov. (holotype); F, Mohrigia orthacantha (Yang, Zhang & Yang, 1993) (neotype). Scale bar = 0.50 mm.

FIGURE 16. Geographical distribution of Mohrigia from China. The different coloured shapes refer to different collecting sites of the species.